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| author | Alex Deucher <alexdeucher@gmail.com> | 2009-12-23 10:07:50 -0500 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-02-09 09:32:26 +1000 |
| commit | c836a4126768cd76af9ee33b3c11f57695d5fda6 (patch) | |
| tree | 7f9eebbab1ae7d6956ca87c23e0933e3d1331f71 /drivers/gpu/drm/radeon/r300.c | |
| parent | c913e23a145ae07b6f9f88aae8cd5ad06b5729ff (diff) | |
| download | op-kernel-dev-c836a4126768cd76af9ee33b3c11f57695d5fda6.zip op-kernel-dev-c836a4126768cd76af9ee33b3c11f57695d5fda6.tar.gz | |
drm/radeon/kms: add functions to get current pcie lanes
Currently unused.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/r300.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/r300.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c index 748335c..5897bd0 100644 --- a/drivers/gpu/drm/radeon/r300.c +++ b/drivers/gpu/drm/radeon/r300.c @@ -580,6 +580,37 @@ void rv370_set_pcie_lanes(struct radeon_device *rdev, int lanes) } +int rv370_get_pcie_lanes(struct radeon_device *rdev) +{ + u32 link_width_cntl; + + if (rdev->flags & RADEON_IS_IGP) + return 0; + + if (!(rdev->flags & RADEON_IS_PCIE)) + return 0; + + /* FIXME wait for idle */ + + link_width_cntl = RREG32_PCIE(RADEON_PCIE_LC_LINK_WIDTH_CNTL); + + switch ((link_width_cntl & RADEON_PCIE_LC_LINK_WIDTH_RD_MASK) >> RADEON_PCIE_LC_LINK_WIDTH_RD_SHIFT) { + case RADEON_PCIE_LC_LINK_WIDTH_X0: + return 0; + case RADEON_PCIE_LC_LINK_WIDTH_X1: + return 1; + case RADEON_PCIE_LC_LINK_WIDTH_X2: + return 2; + case RADEON_PCIE_LC_LINK_WIDTH_X4: + return 4; + case RADEON_PCIE_LC_LINK_WIDTH_X8: + return 8; + case RADEON_PCIE_LC_LINK_WIDTH_X16: + default: + return 16; + } +} + #if defined(CONFIG_DEBUG_FS) static int rv370_debugfs_pcie_gart_info(struct seq_file *m, void *data) { |
